Sharon Donnelly (born July 29, 1967 in Toronto, Ontario) is an athlete from Canada, who competed in triathlon (1.5-km swim, 40-km cycle, 10-km run).

She won the gold medal at the 1999 Pan American Games in Winnipeg, Manitoba, Canada.

She was Race Director for the inaugural Canadian Forces Base triathlon in Kingston, Ontario in May 2004.

She taught physical education at Saint Lawrence College, and coached local junior, age group triathletes.

Since moving to Colorado Springs in 2006, Donnelly has worked at the United States Olympic Training Centre as assistant National Triathlon Team coach.